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Factors influencing reproductive performance of cows from different Nguni ecotypes in southern Mozambique

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Abstract

The objective of this study was to assess the reproductive performance of two Nguni ecotypes (Nguni and Landim) raised in a subtropical environment to enhance strategies for livestock development and restocking programmes within the southern African region. Reproduction data collected between 1996 and 2009 from 365 cows of the Landim and Nguni ecotypes were analysed. From the results, ecotype, place of birth, year and season of birth/calving had significant effects on age at first calving (AFC) and calving interval (CI). Overall means for AFC and CI were 1,071 ± 166 days and 432 ± 85 days, respectively, while average calving rate was 88.0 ± 4.7%. Heifers born in the dry season had lower AFC than heifers born in the wet season. Heifers born at Impaputo Breeding Center were the youngest at first calving, followed by the South African born ones. Heifers of the Landim ecotype also calved younger than heifers of the Nguni ecotype. CI was shorter in wet seasons (main breeding seasons) than in dry seasons. Interaction between ecotype and year–season (p < 0.005) showed that, in wet and dry seasons, Nguni cows had shorter CI than the Landim. This study demonstrates for the first time a possible genotype-by-environment interaction between Nguni ecotypes. This might aid future cattle development and restocking programmes in southern Africa taking into consideration the adaptation of indigenous genotypes and climate change.

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Acknowledgements

This research was possible due to the AWARD research placement fellowship and ILRI collaboration, to whom we are very grateful. We also thank the PFI managers, REMOC Lda, and staff for managing the animals and making the data available for our research. Red Meat Research and Development South Africa also made a financial contribution towards this research. To the new office mate at ILRI, Denis Mujibi, for the open eyes, sharp comments and all the support.

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Correspondence to Sonia Maria Ataide Maciel.

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Maciel, S.M.A., Amimo, J., Martins, M. et al. Factors influencing reproductive performance of cows from different Nguni ecotypes in southern Mozambique. Trop Anim Health Prod 44, 435–444 (2012). https://doi.org/10.1007/s11250-011-9915-0

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